6 signs of early kidney disease: 1, urine foam, does not disappear for a long time, indicating that the urine excretion of more protein; 2, urine discoloration, a strong tea, wash water, soy sauce color or turbid like rice water, indicating that there may be red cells or white cells; 3, too much or too little urine; Chinese People’s Liberation Army Rocket Army General Hospital, Department of Nephrology Tu Xiaowen 4, increased nocturia: normal people within 60 years of age should not generally have nocturia, if young people increased nocturia, it is likely to be an early manifestation of poor kidney function; 5, morning eyelids or face edema; 6, no clear cause of low back pain, etc..